Source : Webster's Revised Unabridged Dictionary (1913)

Problematic \Prob`lem*at"ic\, Problematical \Prob`lem*at"ic*al\,
   a. [L. problematicus, Gr. ?: cf. F. probl['e]matique.]
   Having the nature of a problem; not shown in fact;
   questionable; uncertain; unsettled; doubtful. --
   {Prob`lem*at"ic*al*ly}, adv.

         Diligent inquiries into remote and problematical guilt
         leave a gate wide open to . . . informers. --Swift.

Source : WordNet®

problematically
     adv : in such a way as to pose a problem